Transmission apparatus and method of status indication and communication system
A transmission apparatus and method of status indication and a communication system. The transmission method of status indication includes: determining whether an RLC layer has successfully received all RLC PDUs of uplink data when a base station receives the uplink data transmitted by a UE; and transmitting PDCCH information to the UE, in a case where the RLC layer has successfully received all the RLC PDUs of the uplink data; the PDCCH information is used to indicate that the uplink data have been successfully received and/or the UE is permitted to enter into a DRX status. Hence, not only transmission of RLC status report may be reduced and transmission efficiency of the whole system may be improved, but also the UE may be made to enter into the DRX status as fast as possible and power consumption of the UE may be lowered.
1. A transmission apparatus of status indication, configured in a base station, the transmission apparatus of status indication comprising:
a memory that stores a plurality of instructions; and
processor circuitry that couples to the memory and that is configured to execute the plurality of instructions to:
determine whether a radio link control (RLC) layer has successfully received all RLC protocol data units (PDUs) of uplink data when the base station receives the uplink data transmitted by a user equipment (UE); and
transmit physical downlink control channel (PDCCH) information to the UE, in a case where the RLC layer has successfully received all the RLC PDUs of the uplink data; wherein, the PDCCH information is used to indicate that the UE is permitted to enter into a discontinuous reception (DRX) status.
2. The transmission apparatus of status indication according to claim 1 , wherein the processor circuitry is further configured to:
determine whether there exist downlink data for the UE needing to be transmitted;
transmit first PDCCH information to the UE for indicating that the uplink data have been successfully received, in a case where the RLC layer has successfully received all the RLC PDUs of the uplink data and there exist downlink data for the UE needing to be transmitted.
3. The transmission apparatus of status indication according to claim 2 , wherein the processor circuitry is further configured to transmit second PDCCH information to the UE for indicating that the uplink data have been successfully received and the UE is permitted to enter into the DRX status, in a case where the RLC layer has successfully received all the RLC PDUs of the uplink data and there exists no downlink data for the UE needing to be transmitted.
4. The transmission apparatus of status indication according to claim 2 , wherein the processor circuitry is further configured to transmit third PDCCH information to the UE for indicating that the uplink data have been successfully received and the UE is permitted to enter into the DRX status after performing feedback, in a case where the RLC layer has successfully received all the RLC PDUs of the uplink data and there exists no downlink data for the UE needing to be transmitted.
5. The transmission apparatus of status indication according to claim 1 , wherein a newly-added field in a downlink control information (DCI) format of a PDCCH is used to carry the PDCCH information.
6. The transmission apparatus of status indication according to claim 5 , wherein the newly-added field comprises a flag field;
wherein, a value 0 of the flag field denotes that the newly-added field is used to carry the PDCCH information, or a value 1 of the flag field denotes that the newly-added field is used to carry the PDCCH information.
7. The transmission apparatus of status indication according to claim 6 , wherein the newly-added field further comprises a direct indication information field, a value of the direct indication information field denoting first PDCCH information, and another value of the direct indication information field denoting second PDCCH information.
8. The transmission apparatus of status indication according to claim 6 , wherein the newly-added field further comprises a direct indication information field, a value of the direct indication information field denoting first PDCCH information, and another value of the direct indication information field denoting third PDCCH information.
9. The transmission apparatus of status indication according to claim 8 , wherein the newly-added field further comprises a resource block assignment field, a value of the resource block assignment field being used to indicate resources used by the UE in performing the feedback.
10. The transmission apparatus of status indication according to claim 1 , wherein an existing field in the DCI format of the PDCCH is used to carry the PDCCH information.
11. The transmission apparatus of status indication according to claim 10 , wherein a value 0 of a repetition number field in the DCI format denotes first PDCCH information, and/or a value 0 of a subframe repetition number field in the DCI format denotes second PDCCH information.
12. A transmission apparatus of status indication, configured in a user equipment (UE), the transmission apparatus of status indication comprising:
a memory that stores a plurality of instructions; and
processor circuitry that couples to the memory and that is configured to execute the plurality of instructions to:
monitor a physical downlink control channel (PDCCH) after the UE transmits uplink data; and
receive PDCCH information transmitted by a base station via the PDCCH, the PDCCH information being used to indicate that the UE is permitted to enter into a discontinuous reception (DRX) status.
13. The transmission apparatus of status indication according to claim 12 , wherein the PDCCH information is first PDCCH information, and the processor circuitry is further configured to indicate to a radio link control (RLC) layer that the uplink data have been successfully received.
14. The transmission apparatus of status indication according to claim 13 , wherein the processor circuitry is configured to proceed with monitoring the PDCCH.
15. The transmission apparatus of status indication according to claim 12 , wherein the PDCCH information is second PDCCH information, and the processor circuitry is further configured to indicate to an RLC layer that the uplink data have been successfully received.
16. The transmission apparatus of status indication according to claim 15 , wherein the processor circuitry is further configured to:
control the UE to enter into the DRX status.
17. The transmission apparatus of status indication according to claim 12 , wherein the PDCCH information is third PDCCH information, and the processor circuitry is further configured to indicate to an RLC layer that the uplink data have been successfully received.
18. The transmission apparatus of status indication according to claim 17 , wherein the processor circuitry is further configured to:
feed back information to the base station on a resource indicated by the third PDCCH information; and
control the UE to enter into the DRX status after performing feedback.
19. The transmission apparatus of status indication according to claim 12 , wherein a newly-added field in a DCI format of a PDCCH is used to carry the PDCCH information;
or, an existing field in the downlink control information (DCI) format of the PDCCH is used to carry the PDCCH information.
20. A communication system, comprising:
a base station comprising a transmission apparatus of status indication, the transmission apparatus of status indication comprising:
a first memory that stores a plurality of first instructions; and
first processor circuitry that couples to the first memory and is configured to execute the plurality of first instructions to:
determine whether a radio link control (RLC) layer has successfully received all RLC protocol data units (PDUs) of uplink data when the base station receives the uplink data transmitted by a user equipment (UE); and
transmit physical downlink control channel (PDCCH) information to the UE, in a case where the RLC layer has successfully received all the RLC PDUs of the uplink data; wherein, the PDCCH information is used to indicate that the UE is permitted to enter into a discontinuous reception (DRX) status, and
a UE transmission apparatus of status indication comprising:
a second memory that stores a plurality of second instructions; and
second processor circuitry that couples to the second memory and is configured to execute the plurality of instructions to:
monitor a PDCCH after the UE transmits uplink data; and
receive PDCCH information transmitted by a base station via the PDCCH, the PDCCH information being used to indicate that the UE is permitted to enter into a DRX status.